Imagine someone somehow gets access to your WordPress admin dashboard.
If it was me, the first thing I'd do is fiddle with and disable any security plugins.
But with Shield's Security Admin module, this isn't a problem. When active this feature will prevent any user, admin or otherwise, from viewing or modifying any Shield options, as well as preventing the plugin from being deactivated.
We highly recommend turning on this option.
Currently the security admin is authenticated with the 'Security Admin PIN'.
You can't turn on the security admin feature without first supplying the PIN.
On the main 'Disable Module' section, you must check on the checkbox and supply a key. You must remember this key, because you'll be asked for it later.
You mightn't think you supplied a key in the past because you can't remember giving it a key. But if it's asking you for a key, then you (or someone else) gave it a key.
Can you tell we get this question a lot? (though usually far less politely presented)
Still can't remember the key? See below...
You have 1 of 2 options. The 2nd is a little drastic and if you can do the 2nd, you can certainly do the 1st option - which is the recommended.